private void UpdateAll()
{
Brush brush = new SolidBrush(pnlBackground.BackColor);
G.FillRectangle(brush, 0, 0, B.Width, B.Height);
for (int i = 0; i < Polygons.Count; i++)
{
Polygons[i].Draw();
}
ClipPolygon.Draw();
}
private void ClipAndDraw()
{
if (curstep == 0)
{
Result = new GraphPolygon(B, G, new Pen(pnlCuttingLine.BackColor, 2));
}
for (int i = 0; i < Polygons.Count - 1; i++)
{
if (PolygonClip(Polygons[i], ref Result, ClipPolygon))
{
Result.Draw();
}
}
}